How to use the uart unit app test in i.mx6?

taehunkim — Mon, 16 Feb 2015 06:37:52 GMT

Dear Sir,

We're testing the uart's operation with the i.mx6 dual lite board.

The Kernel version is "Linux freescale 3.0.35-2666-gbdde708 #6 SMP PREEMPT Mon Feb 16 09:25:50 KST 2015 armv7l GNU/Linux".

And we're using the gnome release package S/W in the i.mx6 dual lite board.

We had found uart unit test app in the gnome release package S/W.

But we think that the app doesn't work well.

Our test result is as follows.

root@freescale /unit_tests$ ./mxc_uart_xmit_test.out /dev/ttymxc2

UART 115200, 8bit, 1stop, PARENB, HW flow disabled

test begin, press 'c' to exit

sent 10000 bytes with speed 102301.790281bps

sent 10000 bytes with speed 102432.778489bps

tcount=60000

rcount=0

test exit

root@freescale /unit_tests$

We expect that the rx data will be saved in the uart_read.txt file.

But rcount is 0 and the uart_read.txt file is null.

If there is an additional setting for this test, please let us know.

Sincerely,

Taehun Kim

Research Engineer

LG Electronics

Re: How to use the uart unit app test in i.mx6?

igorpadykov — Mon, 16 Feb 2015 10:49:50 GMT

Hi Taehun

had you tried to loopback UART (connect RX with TX),

do you see signals on TX line with oscilloscope ?

Best regards

igor

taehunkim — Mon, 16 Feb 2015 23:52:33 GMT

Dear Sir,

We could solve the problem with your advice(connect RX with TX).

Thank you very much.

Sincerely,

Taehun Kim